Twice the price? I guess you're buying somewhere local. What price are they?
The 8" in $AU is anywhere from $400-$550, and the 10" is anywhere from $550-$700.
The 10" is great and will definitely serve you longer than the 8". In the future you can put it on an EQ mount for photography if you choose.
btw
to IceInSpace!
Tell us about yourself!